Practice Quiz 2
For this exercise, please watch the first tutorial video before answering the questions. You are encouraged to use the video as much as you would like to answer the following questions. You will have an opportunity at the end to check your answers and retry as many times as you would like.
Sign in to Google to save your progress. Learn more
Earth Optics Video 2: Cross Polarized Light
All of the grains in the picture below are the same mineral in plane polarized light. Only knowing what we can see here, what can we say about this mineral?
Clear selection
The example in the video below is first seen in plane polarized light and then in cross polarized light. What can we say about this mineral?
Clear selection
This is the Michel-Levy Chart. Please use it for the following two questions.

Michel-Levy Chart: University of Liverpool. D Flinn G Newall
Assuming a thickness of 30 microns, what is the birefringence of this mineral?
Clear selection
Assuming a thickness of 30 microns, what is the birefringence of the mineral grain labeled A?
Clear selection
If you'd like to sign up for occasional fun mineralogy emails and updates about the videos and quizzes, please enter your email here.
Please leave any comments, questions, or suggestions here!
Submit
Clear form
Never submit passwords through Google Forms.
This content is neither created nor endorsed by Google.